孟德尔遗传规律不适合于原核生物是因为原核生物 (    )

    What are some of the steps a person can take to prevent his house from being broken in while he or she is away? One step is to make sure that the house has a live-in look. Living room shades could be pulled down only half-away. Bedrooms that usually have the shades pulled down at night should be left down. Another is to make sure that all outside looks are the dead-belt(带) type. Still another is to leave several low-watt(瓦) lights burning and make sure that one is in the kitchen. Lights that turn on and off automatically(自动地) are the best. Then, too, it is a good idea to leave a radio turned into a talking station. Any type of conversation makes a burglar(盗贼) think twice before trying to enter. Finally, while away on vacation, make sure that nothing collected in the front or back of the house. Make certain that the newspaper is stopped and that a trusted neighbor has been asked to pick up the posts.

陈太丘与友期行

    陈太丘与友期行，期日中，过中不至，太丘舍去，去后乃至。元方时年七岁，门外戏。客问元方：“尊君在不？”答曰：“待君久不至，已去。”友人便怒：“非人哉！与人期行，相委而去。”元方曰：“君与家君期日中，日中不至，则是无信；对子骂父，则是无礼。”友人惭，下车引之，元方入门不顾。